Linear Technology LTC2950CTS8-2, On/Off Controller, Vin (26.4V Max) = 2.7V - 26.4V DC826B-A DC826B-A 데이터 시트
제품 코드
DC826B-A
LTC2950-1/LTC2950-2
3
295012fd
SYMBOL
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
V
IN
Supply Voltage Range
Steady State Operation
l
2.7
26.4
V
I
IN
V
IN
Supply Current
System Power On, V
IN
= 2.7V to 24V
l
6
12
µA
V
UVL
V
IN
Undervoltage Lockout
V
IN
Falling
l
2.2
2.3
2.4
V
V
UVL(HYST)
V
IN
Undervoltage Lockout
Hysteresis
50
300
600
mV
Pushbutton, Enable (PB, EN/EN)
V
V
PB(MIN, MAX)
PB Voltage Range
Single-Ended
l
–1
26.4
V
I
PB
PB Input Current
2.5V < V
PB
< 26.4V
V
PB
= 1V
V
PB
= 0.6V
l
l
l
–1
–3
–6
–9
±1
–12
–15
µA
µA
µA
V
PB(VTH)
PB Input Threshold
PB Falling
l
0.6
0.8
1
V
V
PB(VOC)
PB Open Circuit Voltage
I
PB
= –1µA
1
1.6
2
V
t
EN/EN, Lock Out
EN/EN Lock Out Time (Note 5)
Enable Released
→ Enable Asserted
l
200
256
325
ms
I
EN/EN(LKG)
EN/EN Leakage Current
V
EN/
EN
= 1V, Sink Current Off
l
±0.1
µA
V
EN/EN(VOL)
EN/EN Voltage Output Low
I
EN/
EN
= 3mA
l
0.11
0.4
V
Debounce Timing Pins (ONT, OFFT)
I
I
ONT, OFFT(PU)
ONT/OFFT Pull Up Current
V
ONT, OFFT
= 0V
l
–2.4
–3
–3.6
µA
I
ONT, OFFT(PD)
ONT/OFFT Pull Down Current
V
ONT, OFFT
= 1.3V
l
2.4
3
3.6
µA
t
DB, On
Internal Turn On Debounce Time
ONT Pin Float, PB Falling
→ Enable Asserted
l
26
32
41
ms
t
ONT
Additional Adjustable Turn On Time C
ONT
= 1500pF
l
9
11.5
13.5
ms
t
DB, Off
Internal Turn Off Debounce Time
OFFT Pin Float, PB Falling
→ INT Falling
l
26
32
41
ms
t
OFFT
Additional Adjustable Turn Off Time C
OFFT
= 1500pF
l
9
11.5
13.5
ms
µP Handshake Pins (INT, KILL)
I
I
INT(LKG)
INT Leakage Current
V
INT
= 3V
l
±1
µA
V
INT(VOL)
INT Output Voltage Low
I
INT
= 3mA
l
0.11
0.4
V
V
KILL(TH)
KILL Input Threshold Voltage
KILL Falling
l
0.57
0.6
0.63
V
V
KILL(HYST)
KILL Input Threshold Hysteresis
10
30
50
mV
I
KILL(LKG)
KILL Leakage Current
V
KILL
= 0.6V
±0.1
µA
t
KILL(PW)
KILL Minimum Pulse Width
l
30
µs
t
KILL(PD)
KILL Propagation Delay
KILL Falling
→ Enable Released
l
30
µs
t
KILL, On Blank
KILL Turn On Blanking (Note 3)
KILL = Low, Enable Asserted
→ Enable Released
l
400
512
650
ms
t
KILL, Off Delay
KILL Turn Off Delay (Note 4)
KILL = High, INT Asserted
→ Enable Released
l
800
1024
1300
ms
Note 1: Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2: All currents into pins are positive; all voltages are referenced to
Note 2: All currents into pins are positive; all voltages are referenced to
GND unless otherwise noted.
Note 3: The KILL turn on blanking timer period is the waiting period
Note 3: The KILL turn on blanking timer period is the waiting period
immediately after the enable output is asserted. This blanking time allows
sufficient time for the DC/DC converter and the µP to perform power up
tasks. The KILL and PB inputs are ignored during this period. If KILL remains
low at the end of this time period, the enable output is released, thus turning
off system power. This time delay does not include t
DB, ON
or t
ONT
.
Note 4: The KILL turn off delay is the maximum delay from the initiation
of a shutdown sequence (INT falling), to the release of the enable output.
If the KILL input switches low at any time during this period, enable is
released, thus turning off system power. This time is internally fixed at
1024ms. This time delay does not include t
DB, OFF
or t
OFFT
.
Note 5: The enable lock out time is designed to allow an application to
properly power down such that the next power up sequence starts from a
consistent powered down configuration. PB is ignored during this lock out
time. This time delay does not include t
DB, ON
or t
ONT
.
elecTrical characTerisTics
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
IN
= 2.7V to 26.4V, unless otherwise noted. (Note 2)